398684698 has 4 divisors (see below), whose sum is σ = 598027050. Its totient is φ = 199342348.

The previous prime is 398684683. The next prime is 398684719. The reversal of 398684698 is 896486893.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 294705889 + 103978809 = 17167^2 + 10197^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99671173 + ... + 99671176.

Almost surely, 2^398684698 is an apocalyptic number.

398684698 is a deficient number, since it is larger than the sum of its proper divisors (199342352).

398684698 is a wasteful number, since it uses less digits than its factorization.

398684698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199342351.

The product of its digits is 17915904, while the sum is 61.

The square root of 398684698 is about 19967.0903739128. The cubic root of 398684698 is about 735.9978105736.

The spelling of 398684698 in words is "three hundred ninety-eight million, six hundred eighty-four thousand, six hundred ninety-eight".